I followed https://matomo.org/faq/how-to-install/how-do-i-install-matomo-with-plesk/ (so, fw is disabled also). Excetion is that I set it to root folder of subdomain, not in matomo folder.
NOTHING ELSE I TOUCHED in installation (instance).
First site I tried to add to WP site by Astra Hooks, by Insert Headers and Footers plugin, by WP-Matomo Integration plugin and neither one working, Matomo still not see the website.
Server is on GCP, Ubuntu 20.04, Plesk Click and Deploy solution and run Litespeed server.
Previously I get it working on GCP, Ubuntu 20.04, CyberPanel with OpenLiteSpeed server.
Briefly, I cannot see any structural reason to not get it work.
Any idea of issue?